Pannek, Jürgen
Kennelly, Michael
Kessler, Thomas M.
Linsenmeyer, Todd
Wyndaele, Jean-Jacques
Biering-Sørensen, Fin
Article History
Received: 30 July 2018
Revised: 15 October 2018
Accepted: 16 October 2018
First Online: 1 November 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.